metro/transformer.js

61 lines
1.4 KiB
JavaScript

/**
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*
* Note: This is a fork of the fb-specific transform.js
*/
'use strict';
const babel = require('babel-core');
const fs = require('fs');
const inlineRequires = require('fbjs-scripts/babel-6/inline-requires');
const json5 = require('json5');
const path = require('path');
const babelRC =
json5.parse(
fs.readFileSync(
path.resolve(__dirname, 'react-packager', '.babelrc')));
function transform(src, filename, options) {
options = options || {};
const extraPlugins = ['external-helpers-2'];
const extraConfig = {
filename,
sourceFileName: filename,
};
const config = Object.assign({}, babelRC, extraConfig);
if (options.inlineRequires) {
extraPlugins.push(inlineRequires);
}
config.plugins = extraPlugins.concat(config.plugins);
const result = babel.transform(src, Object.assign({}, babelRC, config));
return {
code: result.code
};
}
module.exports = function(data, callback) {
let result;
try {
result = transform(data.sourceCode, data.filename, data.options);
} catch (e) {
callback(e);
return;
}
callback(null, result);
};
// export for use in jest
module.exports.transform = transform;